121017890131 has 8 divisors (see below), whose sum is σ = 127115829504. Its totient is φ = 114989641800.

The previous prime is 121017890107. The next prime is 121017890153. The reversal of 121017890131 is 131098710121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121017890131 - 2⁷ = 121017890003 is a prime.

It is a super-2 number, since 2×121017890131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121017890431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17419201 + ... + 17426146.

It is an arithmetic number, because the mean of its divisors is an integer number (15889478688).

Almost surely, 2^121017890131 is an apocalyptic number.

121017890131 is a deficient number, since it is larger than the sum of its proper divisors (6097939373).

121017890131 is a wasteful number, since it uses less digits than its factorization.

121017890131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34845521.

The product of its (nonzero) digits is 3024, while the sum is 34.

The spelling of 121017890131 in words is "one hundred twenty-one billion, seventeen million, eight hundred ninety thousand, one hundred thirty-one".